Spring seat construction



Aug. 16, 1938. w, STEFFENS 2,127,093

SPRING SEAT CONSTRUGT ION Filed NOV. 16, 1935 f/WX/ MW #646 ML /5 Z/ wZ6 Z5 i 7 54 Z0 M, 45 5/ mm 5 7 125 M Z/ J1WSi8/ /8n K6 G u- I IPatented Aug. 16, 1938 UNITED STATES FATENT OFFICE 1 Claim.

tions and more particularly to an improved spring construction for theseats of furniture, motor vehicles or the like.

An object of this invention is to provide in a seat construction of thischaracter a means for suspending springs within a frame so that variousportions of the suspended spring structure may move one relative toanother, thus permitting the main supporting spring structure to conformto the configuration of the body on the seat.

Another object of this invention is to provide in a spring constructionof this character means to prevent twisting of the spring supportingbars so that the main springs will not become twisted.

The above and various other objects and advantages of this inventionwill in part be described in, and in part be understood from thefollowing detail description of the present preferred embodiment, thesame being illustrated in the accompanying drawing wherein:

Figure 1 is a top plan view of a spring seat structure constructedaccording to an embodiment of this invention.

Figure 2 is a sectional view taken on the line 22 of Figure 1, showingalso a back with the seat structure.

Figure 3 is an enlarged fragmentary sectional View taken on the line 3-3of Figure 2.

Referring to the drawing wherein like symbols designate correspondingparts throughout the several views, the numeral l designates generally aframe construction including side bars l3 and front and rear bars I land I2 respectively. This frame structure may be constructed out of anysuitable material, such as wood or metal, and may be of any suitableconfiguration depending only upon the character of the article offurniture with which the seat construction is associated.

A plurality of coil springs I4, I 5, and I6 are disposed within theframe I!) and the tops of these springs are adapted to engage beneath aconventional covering means, generally designated as IT. The coilsprings are supported for individual and independent movement by meansof straps l8, l9 and 20, respectively. The strap 58 is disposed at thefront of the frame and has a reverted inner end portion 2| provided witha pair of holes through which the forward ends of a pair of coil springs22 are adapted to engage. These coil springs 22 are disposed in spacedapart relation and the opposite ends of the coil springs 22 engage inholes provided in the reverted forward end portion 23 of theintermediate sup- This invention relates to furniture construcportingbar IS. The rear end of the intermediate bar I!) is reverted, as at 24,and the forward ends of rear coil springs 25 engage in spaced apartopenings provided in the rear end of the intermediate bar or strap I9.The rear strap or bar 20 has a reverted forward end portion 26 in whichthe rear ends of the coil springs 25 engage. While I have shown a singleintermediate bar 19 between the front and rear bars or straps l8 and 12!? respectively, it will be understood that as many intermediate strapsI9 may be used as is considered necessary, depending only upon thelength of the side rails l3 and the particular type of seat constructionwith which the seat and spring structure is to be used.

In order to provide a means whereby the front and rear straps or bars l8and may be rockably connected to the frame HI, I have provided .a loopedend portion 21 formed by bending the strap It in the form of a loop andthen spot- 20 welding, as at 28, or otherwise securing the re vertedportion of the strap. A hinge bar 29 is adapted to loosely engage withinthe eye or opening provided by the reverted portion 2'! and the oppositeends of the pintle or hinge bar 29 are forwardly offset, as at 30, sothat the barrel or loop 21 will be permitted to have free rockingmovement with respect to the frame construction. The ofiset end portions30 of the pintle 29 are secured as by fastening devices 34 in the formof bolts or the like to the front frame bar I l. The rear strap 20 ishingedly secured to the rear frame bar l2 in the same manner as thefront strap I 8.

The lower ends of the main coil springs l4, I5 35 and I6 are secured inany suitable manner to the straps I8, l9 and 2!] respectively. Aplurality of coil spring suspending means are provided, as shown inFigure 1 of the drawing, with each set of coil springs being disposed inspaced apart relation and permitted to have independent movement onerelative to another and as many series of coil springs with thesuspending means therefor may be used as are considered necessary toproperly maintain the top or cushion structure I! in a smooth condition.

In the use of this spring structure, the bars l8 and 20 are hingedlysecured to opposed frame bars of the frame ill and, in the presentinstance, are secured to the front and rear frame bars ll and I2respectively. As many bars i8, i9 and 20, with associated coil springs22 and 25, may be used as are considered necessary, depending on thesize of the seat or frame and then the covering structure I! is securedover the coil springs I 4, l5 and I6. Due to the independent suspensionof the coil springs l4, l5 and IE, it will be obvious that when a weighthas been placed on the covering I! these springs l4, l5 and I6 will movein a vertical direction so that they will not have a tendency to becometwisted and this resistance to twisting of the coil springs is resistedby the pairs of springs 22 and 25 which suspend the intermediate strapsor bars l9 between the end straps or bars l8 and 20. Due to theindependent suspension of the coil springs l4, l5 and IS, the seatstructure will more readily conform to the body of the person seatedthereon and .in

this manner the seat structure will be more comfortable and will also bemore durable because of the fact that the coil springs are mounted in amanner whereby the movement thereof will be a vertical movement ratherthan an angular movement, particularly the intermediate springs.

I claim:-

A spring structure comprising a substantially rectangular frame, aplurality of parallel spaced apart members disposed within the frame,each member comprising a pair of metallic outer strap members, anintermediate metallic strap member, each of said strap members havingreverted opposite ends with the outer ends of said outer strap membershaving loops integral therewith, pairs of spaced apart springsconnecting the adjacent ends of said outer strap members with saidintermediate strap member and engaging through the reverted ends of saidstrap members, a pintle extending through each looped end, offset endscarried by each pintle, means securing each offset end to said frame,and a vertically disposed coil spring carried by each strap, said coilsprings having the lower ends thereof fixedly secured to a strap.

ALBERT W. STEFFENS.

